Rotary seal for well drilling apparatus,申请号GB19580013545-传众专利搜索

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发明名称	Rotary seal for well drilling apparatus
摘要
申请公布号	GB834745(A)	申请公布日期	1960.05.11
申请号	GB19580013545	申请日期	1958.04.29
申请人	PHILLIPS PETROLEUM COMPANY	发明人
分类号	E21B33/08	主分类号	E21B33/08
代理机构		代理人
主权项
地址

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